Route Reliability
Chicago → Portland
ORD–PDX · 1,739 miles · Chicago O'Hare International Airport to Portland International Airport
- 72%
- Arrive within 15 minutes
- 12 min
- Average arrival delay
- 0.8%
- Cancelled
- 2,730
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.Alaska Airlines76%515 flights
- 2.United Airlines74%1,386 flights
- 3.American Airlines66%829 flights
What the data says
Morning flights do better here.
ORD–PDX flights departing between 6–9 AM arrived on time 85% of the time, versus 48% between 9 PM–12 AM.
Friday is doing you no favors.
ORD–PDX flights arrived on time 76% of the time on Thursdays. On Fridays: 68%.
Alaska Airlines runs this route best.
Alaska Airlines arrived on time 76% of the time on this route; American Airlines managed 66%.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon72%(406 flights)
- Tue74%(366 flights)
- Wed71%(357 flights)
- Thu76%(396 flights)
- Fri68%(399 flights)
- Sat74%(375 flights)
- Sun69%(404 flights)
- 6–9 AM85%(471 flights)
- 9 AM–12 PM80%(457 flights)
- 12–3 PM75%(719 flights)
- 3–6 PM69%(399 flights)
- 6–9 PM58%(492 flights)
- 9 PM–12 AM48%(165 flights)
Jun 77% → May 74% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 77% | 289 |
| July 2025 | 72% | 290 |
| August 2025 | 75% | 293 |
| September 2025 | 87% | 257 |
| October 2025 | 70% | 261 |
| November 2025 | 73% | 170 |
| December 2025 | 58% | 163 |
| January 2026 | 73% | 137 |
| February 2026 | 70% | 147 |
| March 2026 | 61% | 176 |
| April 2026 | 65% | 237 |
| May 2026 | 74% | 283 |
Same trip, other airports
Keep nerding
Based on 2,730 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.